The Netherlands was represented by the group Harmony, with the song '"'t Is OK", at the 1978 Eurovision Song Contest, which took place in Paris on 22 April. Harmony were the winners of the Dutch national final for the contest, held on 22 February.

On the night of the final Harmony performed 11th in the running order, following Belgium and preceding Turkey. Along with the United Kingdom's Co-Co, Harmony came in for some criticism for their garish and clashing stage costumes. At the close of voting "'t Is OK" had received 37 points from eight countries (including a maximum 12 from Israel), placing the Netherlands 13th of the 20 entries. The Dutch jury reciprocated the Israeli 12 points by awarding its 12 to contest winner "A-Ba-Ni-Bi".[2]